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“You also don’t really know a lot about what’s going on and part of the job is to keep everything a secret. No spoilers.”

Ian claimed many of the decisions surrounding shooting the film were made in the “chain of command” and said he had no control over what happened.

He continued: “Because of that, even if you’re in it you’re kind of flying blind and you really have no idea what to expect.

“In that sense it’s not like anything else I’ve ever done and I personally find that frustrating because you have no idea where you’re going to end up in this whole thing.”

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Ian McElhinney wasn't happy with filming Star Wars Rogue One

Recalling his experience, Ian admitted it was “great” to be a part of the iconic movie but won’t be rushing back to feature in more spin-offs any time soon.

“It’s great to be able to say, 'Yes I’ve been in a Star Wars film,' but on the other hand the actual experience of doing it was not particularly satisfying for me,” he added.

Ian has also been a part of another huge phenomenon, Game of Thrones, which is known for attempting to be top secret to avoid any leaks or spoilers.

However, the Northern Ireland star, who played Ser Barristan Selmy in the HBO series, admitted filming the show was very different to appearing in Star Wars.

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Ian McElhinney starred in Game of Thrones

“Those guys knew exactly what they wanted to do so there was a clearer agenda, a clearer brief,” he said.

With the current season eight already being plagued by speculation and spoiler pictures, Ian admitted at the beginning it wasn’t an issue.

The Derry Girls star said: “As it went on and became more and more popular, you were given sight of less. In the first season at the beginning, I got all the scripts, all 10 scripts even if i wasn’t in all 10.

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Ian McElhinney will be starring in new Superman show Krypton

“But later on you only got the scripts you were in and at a later point you only got the script you were doing and now you get it by email not hard copy.”

Ian will now be hitting screens in new series Krypton where he will appear as Val-Eg, the great, great grandfather of Superman in the programme which kicks off on Syfy next month.

As well as appearing in many TV shows, Ian has hit the big screen and starred in thriller Bad Day For the Cut which is out now on DVD.